I tried all before. Currently using Enfamil.
S26 is good for weight gain.
Similac and Enfamil is good too.
Depends on which suits your baby and what your baby likes 🙂
Its all depend on LO. Mine is enfamil. Tried similac but LO keep on spit up, constipated. However my friend LO is ok With similac and not enfamil.